Quote:
Originally Posted by jeff88
Going the other direction... would decreasing the diameter speed up the air flow increasing power? (within reason of course, not downsizing to 1/2" or something)
What is too much? Is 1/4" within limits? Say 2-3/4" to 3" diameter pipe?
How does the Jeep run with the 1" larger pipe? Does it have more power, more "zip", better throttle response? Or just the opposite?
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The question needs more information for clarity. Is the question in regards to everything in front of the throttle body or are you building a customer intake manifold?
If it is in front of the throttle body (stock throttle body) you can expect nearly zero gains. If you install a larger throttle body then yes, you may see better WOT performance but may suffer some part throttle drivability.
Also, what is your goal? What is the reason for the question?